.270 Powder Recommendations

Most consistent load I've ever used is 56-57 gr of IMR 4831 in Fed ,Win or Imperial brass with a Fed or CCI large rifle mag primer under a 130gr Hornady SP. Killed everything from coyotes to moose. One cow moose at 600yards when I was 20 and had better peepers.
 
I have tried IMR 4350, H4350, H4831sc, and Rl 16, they all worked fine with a 130 grains bullet. H4831 is what made the 270 the 'king of the hill'. My best accuracy was with the now discontinued IMR 4551, 3 bullets tried with sub 0.5 moa groups for all 3, from a Sako A7. I hope Hodgdon will start producing this powder again.
 
The OP isn't bothering to answer any of your suggestions and doesn't even bother to let us know which, if any primers/powders/projectiles he has at hand or a lead on.

Until we know that???????

Lots of online loading information from the manufacturers of powders and components, such as Nosler, Hornady, Sierra, Hodgdon, Alliant, Hodgdon's etc.

We can give him advice until we're blue in the face but unless he knows what his particular rifle prefers, we're just bloing smoke.
 
All good suggestions. The .270 Win. does best with the slow-burning powers. If you take a burn rate chart and look at all the powders between IMR 4350 and IMR 7828, you'll see a lot of powders that will work well. On my burn rate chart (from loaddata.com), that's about 25 powders, although some of these have been discontinued. As has been mentioned, H4831 is the legendary powder for the .270, popularized by Jack O’Connor in his writings in the 1950s and 60s, but the H4831 that O’Connor used was WWII military surplus powder used with the 20mm Oerlikon cannon round and was not identical (likely slower-burning) to today’s H4831. Still, one couldn’t go wrong using H4831 (or H4831sc) in his .270.

I’ve played with QuickLoad a lot in connection with loading for my own .270 and have found that higher velocities at safe pressures are possible with some of the newer powders, like some of the double-base Alliant powders and the Vihtavuori N500 series (and N560 in particular, although this powder burns a little hotter than many others) which are also high-energy powders with some nitroglycerine content. After examining some 10 reasonable powders for the .270 Win., I found that higher velocities in the .270 Win., at safe pressures, should be possible with Alliant Reloder 26 than with any other powder. Of all the other powders run through QuickLoad, none came within 50-60 fps of Re26 at safe SAAMI pressures. (These are QuickLoad results, not the result of actual chronographing.) Re26 has high bulk density, contains a de-coppering additive, and shows pretty good temperature stability.

All of this is a little theoretical, of course, and, at the end of the day, we just have to try the various powders out in our own rifles, chronograph the loads, and perhaps most importantly evaluate them for accuracy.
 
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Staball6.5 works best of all the powders I’ve tried in my son in law’s 270. 130gr bullets. Added bonus it’s also 50 fps faster. It’s a WB Vanguard, and it was really tough to get acceptable groups, and this did the trick at 1” moa.
 
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